437981 has 4 divisors (see below), whose sum is σ = 440832. Its totient is φ = 435132.

The previous prime is 437977. The next prime is 438001. The reversal of 437981 is 189734.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 437981 - 2² = 437977 is a prime.

It is a super-2 number, since 2×437981² = 383654712722, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (437681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1181 + ... + 1506.

It is an arithmetic number, because the mean of its divisors is an integer number (110208).

2⁴³⁷⁹⁸¹ is an apocalyptic number.

It is an amenable number.

437981 is a deficient number, since it is larger than the sum of its proper divisors (2851).

437981 is a wasteful number, since it uses less digits than its factorization.

437981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2850.

The product of its digits is 6048, while the sum is 32.

The square root of 437981 is about 661.8013297055. The cubic root of 437981 is about 75.9425350464.

The spelling of 437981 in words is "four hundred thirty-seven thousand, nine hundred eighty-one".